Cutting-off machine.



K. W. HALLDEN.

CUTTING OFF MACHINE.

APPLICATiON FILED NOV. 11. 1911.

1,303,791 a Patented May 6, 1919.

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K. W. HALLDEN. cunmc OFF MACHINE.

APPLICATION FILED NOV. 1.7.. 1917. 1,302,791 Patented May 6, 1919.

m: Mwms arms co. F 1070 [THO K. W. HALLDEN.

cunme OFF MACHINE.

APPLICATION FILED NOV-17.19l7- 1,302,791, Patented May 6, 1919.

v4 SHEETS-SHEET 3.

K. w., HALLDEN CUTTING OFF MACHINE;

APPLICATION FILED NOV. 17. 1917.

Patented May 6, 1919.

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KARL WILLIAM HALLDEN, 0F WATERBURY, CONN EGTIC'UT.

CUTTING-OFF MACHINE.

Specification of Letters Patent.

Patented May 6, 1919.

' Application filed November 17, 1917. Serial No. 202,505.

To all whom it may concern:

Be it known that I, KARL VVLLLIAM HALL- DEN, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Cutting-Off Machines, of which the following is a specification.

My invention relates to improvements in cutting-off machines, having particular reference to machines for automatically cutting tubing, rod, or sheet metal strip into short and equal lengths, and the object of my improvement is simplicity and economy in construction and convenience and efficiency in use.

In the accompanying drawing Figure 1 is a front elevation of my improved cutting-01f machine.

Fig. 2 is an endelevation of the same.

Fig. 3 is a plan view of the same.

Fig. 4: is an end elevation, on an enlarged scale, of the friction drum and strap.

Fig. 5 is a plan View of the saw table.

Fig. 6 is a side elevation of the same.

Fig. 7 is a front elevation of the stock guiding blocks and adjacent parts.

Fig. 8 is a sectional view on the line 8-8 of Fig. 7. v

Fig. 9 is a sectional view on the line 9-9 of Fig. 7.

Fig. 10 is a View of the feeding rack and connected parts shown in Fig. 2.

Fig. 11 is a sectional view on the line 11-11 of Fig. 2.

Fig. 12 is a sectional view on the line 12-12 of Fig. 1.

Fig. 13 is a sectional view on the line 1313 of Fig. 1.

Fig. 14 is a side elevation of the one way clutch shown in Fig. 2 and the gear incorporated therewith.

Fig. 15 is an end elevation of the same.

Fig. 16 is a sectional View on the line 1616. of Fig. 15.

My improved cutting-off machine comprises a pair of feed rollers 10 for feeding the stock to be out, a cutting-off device of suitable form, such as the circular saw 11 shown in Fig. 1, and mechanism operatively connecting the said rollers and saw and driven in any suitable manner, as by an electric motor 12, all of which devices are supported by a frame 13.

A gear shaft 15 serves as part of the said mechanism and is provided at one end with a clutch 14 that serves as the means for controlling the operation of the feeding and cutting-off devices.

The feed rollers 10 are similar, are grooved suitably to fit the stock, are positioned one above the other, being mounted respectively on a lower shaft 16 and an upper shaft 17, and are connected for simultaneous movement by gears 18 on the said shafts.

The lower shaft 16 is supported in fixed bearings 19, provided in upwardly directed standards 20, and-overhangs the said standards 20 at both ends. The lower roller 10 is mounted on the front end of the shaft 16 and at the rear end of the said shaft 16 is a friction drum or brake drum 21 that is part of a retarding device, the other part being in the form of a strap 22. The lower gear 18 is mounted on the portion of the shaft 16 that is between the bearings 19, and is positioned near the rear bearing 19. Adjacent the front bearing 19 is a spur gear 23 that is operatively connected to the shaft 16 through the medium of a clutch 24.

The upper shaft 17 is supported by a rear bearing 25 and a front bearing 26 so that the front end portion, on which the upper roller 10 is mounted, can be raised and lowered so as to permit of adjustment of the spacing of the rollersto correspond to different sizes of stock, and in the following manner:

Forked upward extensions 27 and 28 are provided in which the bearings 25 and 26 are operatively housed. The rear bearing 25 is pivotally supported in the rear fork 27 by means of a pair of laterally directed trunnions 29 and the front hearing 26 is a sliding fit between the arms of the front fork 28, so that the front portion of the shaft 17' can be swung upwardly and downwardly on the trunnions 29. Adjusting and locking means for cooperating with the front bearing 26 are provided, comprising the adjusting screw. 31 and the coil springs 32. The screw 31 is positioned on the upper side of the said bearing 26 and engages therewith by its lower end, being supported by the cover plate 30 that bridges the ends bearing 26 and the lower end engaged with the standard 20, and may have the said ends of the spring housed in suitable wells 33.

As a matter of convenience in construction, the standards 20 are made as integral portions of an auxiliary frame 34 that is mounted on the main frame 13 by means of the lower base-plate portion 35, the latter serving to connect the lower ends of the said standards 20.

The spring 32 tends to separate the rollers 10, so that by turning the adjusting screw 31 the desired spacing of the said rollers 10 may be obtained.

The brake drum 21 is keyed to the shaft 16 and the band 22 is in the form of a split ring, fitting over the periphery of the drum. A pair of ears 38 extending radially from the ends support the adjusting screw 37 and a fixed pin 36 extending through an enlargement 95 on the side opposite the cars 38 serves to tie the band to the frame.

By turning the adjusting screw 37 the retarding friction for checking the return movement of the roller shaft 16 and the mechanism connected therewith may be regulated.

The shaft 39 for the motor 12 drives from both ends, one end, shown as the left end in Fig. 3, being provided with a spur gear 40, the other or right end having a belt pulley 41 and the said shaft 39 is positioned at right angles to the plane of the shafts 16 and 17 for the rollers 10, the motor 12 being positioned at the rear side of the frame 13, near the lower part thereof and being supported by a bracket or table 42 secured to the said frame 13.

As will be described, the belt pulley 41 serves to provide the rotative movement to the saw 11 and the gear 40 operates the feed rollers 10 for feeding the stock and also the mechanism for shifting the saw 11 to and away from the cutting position.

A shaft 45 is fixedly supported by uprights 46 so as to be positioned adjacent the upper and rear portion of the machine and in parallelism with the motor .shaft 39, and coniprises an overhanging portion 48, shown at the right in Fig. 3, that overhangs the adjacent upright 46. A double pulley is mounted on the overhanging portion 48, comprising an outer portion 44 that is driven from the pulley 41 by the belt 43 and an inner portion 47.

A rocking saw table 50 extends generally forwardly from the fixed shaft 45, being pivotally supported by means of a sleeve bearing 52, engaged with the said shaft 45, and positioned between the uprights 46, and supports by its front end the saw shaft 49. A pulley 53 on the saw shaft 49 is connected by a belt 54 with the inner portion 47 of the double pulley.

Thus the saw is driven in all positions of the saw table and the saw-shaft supported thereby.

As shown in Fig. 1 the feed rollers 10 are at the left side of the machine structure, and they are adapted when in use to feed the stock horizontally toward the right, across the front portion of the machine. The saw 11 is located adjacent the rollers 10 and is normally positioned below the line of delivery of the stock from the rollerslO under normal conditions and is swung upwardly, across the said line in effecting the cutting of the stock.

Devices are provided for guiding the stock both before and after cutting and for steadying or backing the same during the cutting as follows :A guide block 55 extends along the front of the machine, on the upper side of the stock, from close to the feed rollers 10 at the left to the point at the right where it is desired to deliver the pieces that have been cut ofi, the same ending, as shown, adjacent the right side of the machine, the said block 55 being provided on the under side with a groove 56 of suitable form, preferably being V-shaped, and in proper alinement with the rollers 10, the supporting means being in the form of an integral plate 57, positioned at the left end. The said plate 57 has a vertical slot 58 for a screw 59 by which it is secured to the frame, the said slot 58 permitting of adjustment for difi'erent sizes of stock.

The portion of the guide slot 56 between the guide rollers 10 and the saw 11 is closed or substantially closed by a short lower block 60 having a plane upper face 61 that serves as the guide face for the stock and which is supported in a similar manner to the upper guide block 55 by means of an integral plate 62, provided with a vertical slot 63 for the holding screw 64. The V- shaped guide slot 56 and the guide face 61 cooperate to house the stock during the cutting operation.

The portion of the upper guide slot 56 on the side of the saw 11 remote from the rollers 10 is closed by an end block 65 with a groove 66 in the upper face for the stock, the said end block being in the form of a loose piece that is removably secured to the upper block 55 in any convenient manner, as by means of a clamp 67.

The upper face of the end block 65 may be provided with a lip 68 for engaging with the edge of the upper block 55 for convenience in adjusting the groove 66 relatively to the upper guide slot 56.

Below and parallel with the motor shaft 39 is the gear shaft 15, already mentioned, and the same is driven from the left end, as seen in Fig. 3, by means of the gear 68 that meshes with the gear 40, and at the right end is provided with a cone pulley 69.

The main shaft 70 extends through the lower front part of the frame 13 and supports at the right end the cone pulley 71 that is connected with the cone pulley 69 by the belt 72, at the left end the crank plate or disk 73, and at the middle portion the cam 74.

The cam 74 is operatively connected to the saw table by a connecting member composed of the cam follower 75 at the lower end, the head 76 at the upper end, and the two part connecting rod 77 connecting the said cam follower 75 and head 76, the opposed ends of the said rod 77 being connected by means of a turn-buckle 78.

The head 76 is pivotallv connected to the lower side of the saw table 50 by meansof a pivotal pin 79 and a lug or ear 80 depending from the said saw table 50.

The cam follower 7 5 rides on the periphery of the cam 74, and may be held in position by gravity or by means of a spring 81, and the cam is shaped suitably to carry the saw 11 across the line of the stock once dur ing each revolution of the main shaft 70.

The crank disk 7 3 operates the feed rollers 10 in the following manner:A rack 82 operating in vertical guide-ways 83 cooperates with the gear 23 adjacent the upper end and has the lower end connected to the upper end of a connecting rod 84 by means of a stud 85. The lower end of the connecting rod 84 is connected to the crank disk 73 by means of the crank-pin 88.

As a detail, for permitting of adjustment, the lower stud or crank pin 88 is housed in a block 86 that is adapted to slide back and forth in a diametral groove or spline 87 in the crank disk 73 and which is held in the adjusted position by means of an adjusting screw 89.

The rack 82 and the gear 23 are always in engagement, and the said gear 23 is positively locked to the shaft for movement in one direction through the medium of the clutch 24 and rotates freely on the said shaft in the other direction, the shaft referred to being the lower shaft 16, which is engaged at one end by the friction strap 22 and held stationary thereby during the return movement of the gear 23, which corresponds to the downward movement of the rack 82. The feeding of the rollers 10 is effected by the upward movement of the rack 82.

The clutch 24 is a one-wav clutch, and any form of one-way clutch may be used for connecting the gear 23 and shaft 16. Also, in lieu of the driim 21 and split ring 22 some other form of retarding device may be provided for holding the lower shaft 16 against movement during the return movement of the gear 23.

The one way clutch 24, shown particularly in Figs. 14, 15, and 16, comprises an outer member 90 that is secured to the shaft 16 by the set screw 91, and an inner member 92 that rotates freely on the said shaft 16, on

which is mounted the gear 23 for cooperating with the rack 82, and these members have mating parts that are constructed and arranged to permit freely relative rotative movement in one direction and to be locked together for movement in the reverse direction by means of a set of rollers 93 backed by springs 94. r

The said mating parts comprise a sleevelike head 95 of annular form on the outer member 90 that serves as the outer member proper and is in bearing engagement with the outer sides of the rollers 93, and an inner head 96 on the inner member 92 that fits within the annular head 95 and is inclosed thereby and that is provided on the periphery at spaced intervals with open pockets or notches 97 for completing the housing of the rollers 93. The pockets 97 comprise a bottom or base wall 98 on which the roller 93 travels and that is inclined slightly relatively to the tangent and at right angles to the said base wall 98 is the approximately radial wall 99.

Extending inwardly from the radial, back or inner wall 99 is the well 100 for the spring 94.

I prefer to provide two springs 94 for each roller 93, housed in two wells 100, side by side. it

Also, as a detail, I inclose the outer end of the spring 94 in a thimble or plugged tube 101.

Thus the pockets 97 are generally V- shaped and the springs 94 tend to hold the rolers in the locking position, at the smaller en The clutch locks the parts for a rotative movement of the gear 23 in the clockwise direction, as viewed in Fig. 15, and permits of independent or relatively free movement of the gear 23 on the shaft 16 in the reverse direction.

During the period in which the rollers 10 are held stationary the cam 74 operates to swing the saw table 50 upwardly so as to carry the saw 11 across the line of delivery of stock from the rollers 10, and the said cam 74, as described, is mounted on the main shaft 70, which also operates the crank disk 73 that drives the rack 82, and these parts are all operated from one end of the motor shaft 39, the other end of which shaft 39 serves to maintain the saw 11 in continuous rotation while the motor is in operation.

The motor 12 is of relatively high speed, as is also the saw 11, so that these parts are interconnected so as to operate without material difference in speed, whereas the gearing interconnecting the motor 12 and the main shaft 7 0 provides an appreciable reduction of speed.

Thus the operation of moving the feed rollers and the operation of swinging the saw across the cutting position are effected intermittently, and these two operations are effected from one end of the motor shaft, through the medium of the main shaft, and the rotation of the saw is effected continuously and from the other end of the said motor shaft.

I claim as my invention 1. A cutting-off machine comprising a frame, feed rollers and a circular saw supported by the said frame, means for intermittently operating the said rollers, means for moving the said saW to and away from the cutting position, mechanism interconneeting the said several means, and a motor for simultaneously operating the said mechanism and rotating the saidsaw.

2. A cutting-off machine comprising feed rollers, means for operating the said rollers in one direction, clutch means operative to check return movement of the said rollers, and cutting-off mechanism for cutting stock delivered by the said rollers.

3. In a cutting-off machine, feed rollers, means for operating the said rollers comprising a rack and pinion, a clutch for connecting the said pinion with the said rollers for one way movement, and a retarding device for preventing return movement of the said rollers.

4. A cutting-off machine comprising feed rollers, a rack and pinion device operative to move the said rollers in one direction, a retarding device for preventing return movement of the said rollers, a cuttin -off device, means for intermittently shifting the'said cutting-off device, and a shaft having a crank for operating the said rack and a cam for operating the said means.

5. A cutting-0E machine comprising feed rollers, means for intermittently operating thesaid rollers, a saw shaft having a saw, means for intermittently raising and lowering the said shaft, and a main shaft having a crank for operating the said first means and a cam for operating the said second means.

6. A cutting-off machine for cutting stock into equal lengths comprising in combination With cutting means other means for feeding the stock to correspond to the length to be cut off and the said other means comprising feed rollers that are maintained in engagement with the stock during the feed ing and also during the cutting operation.

7. A cutting-off machine comprising a circular saw, cooperating mechanism for feeding stock and for shifting the said saw, a motor having a shaft, and one end of the said shaft serving to operate the said saw and the other end thereof serving to drive the said mechanism.

8. In combination in a cutting-off machine, a motor having a shaft, a saw mounted for continuous rotation and connected with one end of the said shaft, and intermittently operated devices for feeding stock and shifting the said saw, the said devices being operated from the other end of the said shaft KARL WILLIAM HALLD'EN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. O. 

